ssh - How do I scp from a second remote host, that requires a key, to the local machine?

Question

I regularly transfer files from a second remote host to my local machine. It would be nice to do this in one go! However, I need to load a key to connect to the second remote host.

Usually, the process is first to connect to the intermediate host:

ssh user@host1
(enter password)

I then load my private key and transfer the file from the third host to the second host:

exec ssh-agent bash
ssh-add ~/.ssh/id-privatekey

scp user@host2:filename filename

Then finally exit the second host and transfer the file from the second host to my local machine

exit

scp user@host2:filename filename

This is time-consuming, and a bit of a pain for large files where the disk space on host1 is limited. The problem is similar to this question, so I tried:

ssh user@host1 'exec ssh-agent bash && ssh-add ~/.ssh/id-privatekey && ssh user@host2 "cat filename"' > filename

which seems to log into the first host, but nothing more. Please could anyone help?

Answer 1

等待大神答复